DETROIT (AP) — Tesla delivered its first electric semis to PepsiCo Thursday, more than three years after Elon Musk said his company would start making the trucks.

The Austin, Texas, company formally delivered the trucks at a factory near Reno, Nevada. The event was livestreamed on Twitter, which Musk now owns.

Musk drove one of three Tesla Semis in front of a crowd inside the factory. One was white, one was painted with a Pepsi logo, and another with Frito-Lay colors.

PepsiCo, which is based in Purchase, New York, is taking part in a zero-emissions freight project at a Frito-Lay facility in Modesto, California. That project is being funded by a $15.4 million clean-freight technology grant from the California Air Resources Board that includes 15 Tesla battery-electric tractors and other electric- and natural-gas powered trucks.

Electric semis also would be eligible for a federal tax credit of up to $40,000.

At an event in November of 2017 unveiling the Tesla Semi, Musk said production would begin in 2019 and the trucks would be able to follow each other autonomously in a convoy. But during Tesla's third-quarter earnings conference call in October he said the company's "Full Self Driving" system is not quite ready to be driverless.

Musk said the truck has a range per charge of 500 miles (800 kilometers) when pulling an 82,000-pound (37,000-kilo) load. The company plans to ramp up Semi production to make 50,000 trucks in 2024 in North America.

Competitors working on hydrogen-powered semis say battery-powered trucks won't work for long-haul carriers because it will take too long to recharge the huge batteries. Musk said hydrogen isn't needed for heavy trucking.